This biological reaction occurs in nature either under complete anaerobiosis or full aerobiosis, in mesophilic (20 to 45 C) or thermophilic (above 45C) conditions (14).    From Wordnik.com.  [Chapter 8] Reference

Thorell B (1959) Fluorescence measurements of mitochondrial pyridine nucleotide in aerobiosis and anaerobiosis.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference